src/content/renderer/media/android/media_source_delegate.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/media/android/media_source_delegate.h"
   6
   7 #include <limits>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/message_loop/message_loop_proxy.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "content/renderer/media/android/renderer_demuxer_android.h"
  14 #include "media/base/android/demuxer_stream_player_params.h"
  15 #include "media/base/bind_to_current_loop.h"
  16 #include "media/base/demuxer_stream.h"
  17 #include "media/base/media_log.h"
  18 #include "media/blink/webmediaplayer_util.h"
  19 #include "media/blink/webmediasource_impl.h"
  20 #include "media/filters/chunk_demuxer.h"
  21 #include "media/filters/decrypting_demuxer_stream.h"
  22 #include "third_party/WebKit/public/platform/WebString.h"
  23 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  24
  25 using media::DemuxerStream;
  26 using media::DemuxerConfigs;
  27 using media::DemuxerData;
  28 using blink::WebMediaPlayer;
  29 using blink::WebString;
  30
  31 namespace {
  32
  33 // The size of the access unit to transfer in an IPC in case of MediaSource.
  34 // 4: approximately 64ms of content in 60 fps movies.
  35 const size_t kAccessUnitSizeForMediaSource = 4;
  36
  37 const uint8 kVorbisPadding[] = { 0xff, 0xff, 0xff, 0xff };
  38
  39 }  // namespace
  40
  41 namespace content {
  42
  43 static void LogMediaSourceError(const scoped_refptr<media::MediaLog>& media_log,
  44                                 const std::string& error) {
  45   media_log->AddEvent(media_log->CreateMediaSourceErrorEvent(error));
  46 }
  47
  48 MediaSourceDelegate::MediaSourceDelegate(
  49     RendererDemuxerAndroid* demuxer_client,
  50     int demuxer_client_id,
  51     const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  52     const scoped_refptr<media::MediaLog> media_log)
  53     : demuxer_client_(demuxer_client),
  54       demuxer_client_id_(demuxer_client_id),
  55       media_log_(media_log),
  56       is_demuxer_ready_(false),
  57       audio_stream_(NULL),
  58       video_stream_(NULL),
  59       seeking_(false),
  60       is_video_encrypted_(false),
  61       doing_browser_seek_(false),
  62       browser_seek_time_(media::kNoTimestamp()),
  63       expecting_regular_seek_(false),
  64       access_unit_size_(0),
  65       main_task_runner_(base::MessageLoopProxy::current()),
  66       media_task_runner_(media_task_runner),
  67       main_weak_factory_(this),
  68       media_weak_factory_(this),
  69       main_weak_this_(main_weak_factory_.GetWeakPtr()) {
  70   DCHECK(main_task_runner_->BelongsToCurrentThread());
  71 }
  72
  73 MediaSourceDelegate::~MediaSourceDelegate() {
  74   DCHECK(main_task_runner_->BelongsToCurrentThread());
  75   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
  76   DCHECK(!chunk_demuxer_);
  77   DCHECK(!demuxer_client_);
  78   DCHECK(!audio_decrypting_demuxer_stream_);
  79   DCHECK(!video_decrypting_demuxer_stream_);
  80   DCHECK(!audio_stream_);
  81   DCHECK(!video_stream_);
  82 }
  83
  84 void MediaSourceDelegate::Stop(const base::Closure& stop_cb) {
  85   DCHECK(main_task_runner_->BelongsToCurrentThread());
  86   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
  87
  88   if (!chunk_demuxer_) {
  89     DCHECK(!demuxer_client_);
  90     return;
  91   }
  92
  93   duration_change_cb_.Reset();
  94   update_network_state_cb_.Reset();
  95   media_source_opened_cb_.Reset();
  96
  97   main_weak_factory_.InvalidateWeakPtrs();
  98   DCHECK(!main_weak_factory_.HasWeakPtrs());
  99
 100   chunk_demuxer_->Shutdown();
 101
 102   // Continue to stop objects on the media thread.
 103   media_task_runner_->PostTask(
 104       FROM_HERE,
 105       base::Bind(
 106           &MediaSourceDelegate::StopDemuxer, base::Unretained(this), stop_cb));
 107 }
 108
 109 bool MediaSourceDelegate::IsVideoEncrypted() {
 110   DCHECK(main_task_runner_->BelongsToCurrentThread());
 111   base::AutoLock auto_lock(is_video_encrypted_lock_);
 112   return is_video_encrypted_;
 113 }
 114
 115 base::Time MediaSourceDelegate::GetTimelineOffset() const {
 116   DCHECK(main_task_runner_->BelongsToCurrentThread());
 117   if (!chunk_demuxer_)
 118     return base::Time();
 119
 120   return chunk_demuxer_->GetTimelineOffset();
 121 }
 122
 123 void MediaSourceDelegate::StopDemuxer(const base::Closure& stop_cb) {
 124   DVLOG(2) << __FUNCTION__;
 125   DCHECK(media_task_runner_->BelongsToCurrentThread());
 126   DCHECK(chunk_demuxer_);
 127
 128   demuxer_client_->RemoveDelegate(demuxer_client_id_);
 129   demuxer_client_ = NULL;
 130
 131   audio_stream_ = NULL;
 132   video_stream_ = NULL;
 133   // TODO(xhwang): Figure out if we need to Reset the DDSs after Seeking or
 134   // before destroying them.
 135   audio_decrypting_demuxer_stream_.reset();
 136   video_decrypting_demuxer_stream_.reset();
 137
 138   media_weak_factory_.InvalidateWeakPtrs();
 139   DCHECK(!media_weak_factory_.HasWeakPtrs());
 140
 141   chunk_demuxer_->Stop();
 142   chunk_demuxer_.reset();
 143
 144   // |this| may be destroyed at this point in time as a result of running
 145   // |stop_cb|.
 146   stop_cb.Run();
 147 }
 148
 149 void MediaSourceDelegate::InitializeMediaSource(
 150     const MediaSourceOpenedCB& media_source_opened_cb,
 151     const media::Demuxer::NeedKeyCB& need_key_cb,
 152     const media::SetDecryptorReadyCB& set_decryptor_ready_cb,
 153     const UpdateNetworkStateCB& update_network_state_cb,
 154     const DurationChangeCB& duration_change_cb) {
 155   DCHECK(main_task_runner_->BelongsToCurrentThread());
 156   DCHECK(!media_source_opened_cb.is_null());
 157   media_source_opened_cb_ = media_source_opened_cb;
 158   need_key_cb_ = need_key_cb;
 159   set_decryptor_ready_cb_ = set_decryptor_ready_cb;
 160   update_network_state_cb_ = media::BindToCurrentLoop(update_network_state_cb);
 161   duration_change_cb_ = duration_change_cb;
 162   access_unit_size_ = kAccessUnitSizeForMediaSource;
 163
 164   chunk_demuxer_.reset(new media::ChunkDemuxer(
 165       media::BindToCurrentLoop(
 166           base::Bind(&MediaSourceDelegate::OnDemuxerOpened, main_weak_this_)),
 167       media::BindToCurrentLoop(
 168           base::Bind(&MediaSourceDelegate::OnNeedKey, main_weak_this_)),
 169       base::Bind(&LogMediaSourceError, media_log_),
 170       false));
 171
 172   // |this| will be retained until StopDemuxer() is posted, so Unretained() is
 173   // safe here.
 174   media_task_runner_->PostTask(FROM_HERE,
 175                         base::Bind(&MediaSourceDelegate::InitializeDemuxer,
 176                         base::Unretained(this)));
 177 }
 178
 179 void MediaSourceDelegate::InitializeDemuxer() {
 180   DCHECK(media_task_runner_->BelongsToCurrentThread());
 181   demuxer_client_->AddDelegate(demuxer_client_id_, this);
 182   chunk_demuxer_->Initialize(this,
 183                              base::Bind(&MediaSourceDelegate::OnDemuxerInitDone,
 184                                         media_weak_factory_.GetWeakPtr()),
 185                              false);
 186 }
 187
 188 blink::WebTimeRanges MediaSourceDelegate::Buffered() const {
 189   return media::ConvertToWebTimeRanges(buffered_time_ranges_);
 190 }
 191
 192 size_t MediaSourceDelegate::DecodedFrameCount() const {
 193   return statistics_.video_frames_decoded;
 194 }
 195
 196 size_t MediaSourceDelegate::DroppedFrameCount() const {
 197   return statistics_.video_frames_dropped;
 198 }
 199
 200 size_t MediaSourceDelegate::AudioDecodedByteCount() const {
 201   return statistics_.audio_bytes_decoded;
 202 }
 203
 204 size_t MediaSourceDelegate::VideoDecodedByteCount() const {
 205   return statistics_.video_bytes_decoded;
 206 }
 207
 208 void MediaSourceDelegate::CancelPendingSeek(const base::TimeDelta& seek_time) {
 209   DCHECK(main_task_runner_->BelongsToCurrentThread());
 210   DVLOG(1) << __FUNCTION__ << "(" << seek_time.InSecondsF() << ") : "
 211            << demuxer_client_id_;
 212
 213   if (!chunk_demuxer_)
 214     return;
 215
 216   {
 217     // Remember to trivially finish any newly arriving browser seek requests
 218     // that may arrive prior to the next regular seek request.
 219     base::AutoLock auto_lock(seeking_lock_);
 220     expecting_regular_seek_ = true;
 221   }
 222
 223   // Cancel any previously expected or in-progress regular or browser seek.
 224   // It is possible that we have just finished the seek, but caller does
 225   // not know this yet. It is still safe to cancel in this case because the
 226   // caller will always call StartWaitingForSeek() when it is notified of
 227   // the finished seek.
 228   chunk_demuxer_->CancelPendingSeek(seek_time);
 229 }
 230
 231 void MediaSourceDelegate::StartWaitingForSeek(
 232     const base::TimeDelta& seek_time) {
 233   DCHECK(main_task_runner_->BelongsToCurrentThread());
 234   DVLOG(1) << __FUNCTION__ << "(" << seek_time.InSecondsF() << ") : "
 235            << demuxer_client_id_;
 236
 237   if (!chunk_demuxer_)
 238     return;
 239
 240   bool cancel_browser_seek = false;
 241   {
 242     // Remember to trivially finish any newly arriving browser seek requests
 243     // that may arrive prior to the next regular seek request.
 244     base::AutoLock auto_lock(seeking_lock_);
 245     expecting_regular_seek_ = true;
 246
 247     // Remember to cancel any in-progress browser seek.
 248     if (seeking_) {
 249       DCHECK(doing_browser_seek_);
 250       cancel_browser_seek = true;
 251     }
 252   }
 253
 254   if (cancel_browser_seek)
 255     chunk_demuxer_->CancelPendingSeek(seek_time);
 256   chunk_demuxer_->StartWaitingForSeek(seek_time);
 257 }
 258
 259 void MediaSourceDelegate::Seek(
 260     const base::TimeDelta& seek_time, bool is_browser_seek) {
 261   DCHECK(media_task_runner_->BelongsToCurrentThread());
 262   DVLOG(1) << __FUNCTION__ << "(" << seek_time.InSecondsF() << ", "
 263            << (is_browser_seek ? "browser seek" : "regular seek") << ") : "
 264            << demuxer_client_id_;
 265
 266   base::TimeDelta internal_seek_time = seek_time;
 267   {
 268     base::AutoLock auto_lock(seeking_lock_);
 269     DCHECK(!seeking_);
 270     seeking_ = true;
 271     doing_browser_seek_ = is_browser_seek;
 272
 273     if (doing_browser_seek_ && (!chunk_demuxer_ || expecting_regular_seek_)) {
 274       // Trivially finish the browser seek without actually doing it. Reads will
 275       // continue to be |kAborted| until the next regular seek is done. Browser
 276       // seeking is not supported unless using a ChunkDemuxer; browser seeks are
 277       // trivially finished if |chunk_demuxer_| is NULL.
 278       seeking_ = false;
 279       doing_browser_seek_ = false;
 280       demuxer_client_->DemuxerSeekDone(demuxer_client_id_, seek_time);
 281       return;
 282     }
 283
 284     if (doing_browser_seek_) {
 285       internal_seek_time = FindBufferedBrowserSeekTime_Locked(seek_time);
 286       browser_seek_time_ = internal_seek_time;
 287     } else {
 288       expecting_regular_seek_ = false;
 289       browser_seek_time_ = media::kNoTimestamp();
 290     }
 291   }
 292
 293   // Prepare |chunk_demuxer_| for browser seek.
 294   if (is_browser_seek) {
 295     chunk_demuxer_->CancelPendingSeek(internal_seek_time);
 296     chunk_demuxer_->StartWaitingForSeek(internal_seek_time);
 297   }
 298
 299   SeekInternal(internal_seek_time);
 300 }
 301
 302 void MediaSourceDelegate::SeekInternal(const base::TimeDelta& seek_time) {
 303   DCHECK(media_task_runner_->BelongsToCurrentThread());
 304   DCHECK(IsSeeking());
 305   chunk_demuxer_->Seek(seek_time, base::Bind(
 306       &MediaSourceDelegate::OnDemuxerSeekDone,
 307       media_weak_factory_.GetWeakPtr()));
 308 }
 309
 310 void MediaSourceDelegate::AddBufferedTimeRange(base::TimeDelta start,
 311                                                base::TimeDelta end) {
 312   buffered_time_ranges_.Add(start, end);
 313 }
 314
 315 void MediaSourceDelegate::SetDuration(base::TimeDelta duration) {
 316   DCHECK(main_task_runner_->BelongsToCurrentThread());
 317   DVLOG(1) << __FUNCTION__ << "(" << duration.InSecondsF() << ") : "
 318            << demuxer_client_id_;
 319
 320   // Force duration change notification to be async to avoid reentrancy into
 321   // ChunkDemxuer.
 322   main_task_runner_->PostTask(FROM_HERE, base::Bind(
 323       &MediaSourceDelegate::OnDurationChanged, main_weak_this_, duration));
 324 }
 325
 326 void MediaSourceDelegate::OnDurationChanged(const base::TimeDelta& duration) {
 327   DCHECK(main_task_runner_->BelongsToCurrentThread());
 328   if (demuxer_client_)
 329     demuxer_client_->DurationChanged(demuxer_client_id_, duration);
 330   if (!duration_change_cb_.is_null())
 331     duration_change_cb_.Run(duration);
 332 }
 333
 334 void MediaSourceDelegate::OnReadFromDemuxer(media::DemuxerStream::Type type) {
 335   DCHECK(media_task_runner_->BelongsToCurrentThread());
 336   DVLOG(1) << __FUNCTION__ << "(" << type << ") : " << demuxer_client_id_;
 337   if (IsSeeking())
 338     return;  // Drop the request during seeking.
 339
 340   DCHECK(type == DemuxerStream::AUDIO || type == DemuxerStream::VIDEO);
 341   // The access unit size should have been initialized properly at this stage.
 342   DCHECK_GT(access_unit_size_, 0u);
 343   scoped_ptr<DemuxerData> data(new DemuxerData());
 344   data->type = type;
 345   data->access_units.resize(access_unit_size_);
 346   ReadFromDemuxerStream(type, data.Pass(), 0);
 347 }
 348
 349 void MediaSourceDelegate::ReadFromDemuxerStream(media::DemuxerStream::Type type,
 350                                                 scoped_ptr<DemuxerData> data,
 351                                                 size_t index) {
 352   DCHECK(media_task_runner_->BelongsToCurrentThread());
 353   // DemuxerStream::Read() always returns the read callback asynchronously.
 354   DemuxerStream* stream =
 355       (type == DemuxerStream::AUDIO) ? audio_stream_ : video_stream_;
 356   stream->Read(base::Bind(
 357       &MediaSourceDelegate::OnBufferReady,
 358       media_weak_factory_.GetWeakPtr(), type, base::Passed(&data), index));
 359 }
 360
 361 void MediaSourceDelegate::OnBufferReady(
 362     media::DemuxerStream::Type type,
 363     scoped_ptr<DemuxerData> data,
 364     size_t index,
 365     DemuxerStream::Status status,
 366     const scoped_refptr<media::DecoderBuffer>& buffer) {
 367   DCHECK(media_task_runner_->BelongsToCurrentThread());
 368   DVLOG(1) << __FUNCTION__ << "(" << index << ", " << status << ", "
 369            << ((!buffer || buffer->end_of_stream()) ?
 370                -1 : buffer->timestamp().InMilliseconds())
 371            << ") : " << demuxer_client_id_;
 372   DCHECK(chunk_demuxer_);
 373
 374   // No new OnReadFromDemuxer() will be called during seeking. So this callback
 375   // must be from previous OnReadFromDemuxer() call and should be ignored.
 376   if (IsSeeking()) {
 377     DVLOG(1) << __FUNCTION__ << ": Ignore previous read during seeking.";
 378     return;
 379   }
 380
 381   bool is_audio = (type == DemuxerStream::AUDIO);
 382   if (status != DemuxerStream::kAborted &&
 383       index >= data->access_units.size()) {
 384     LOG(ERROR) << "The internal state inconsistency onBufferReady: "
 385                << (is_audio ? "Audio" : "Video") << ", index " << index
 386                << ", size " << data->access_units.size()
 387                << ", status " << static_cast<int>(status);
 388     NOTREACHED();
 389     return;
 390   }
 391
 392   switch (status) {
 393     case DemuxerStream::kAborted:
 394       DVLOG(1) << __FUNCTION__ << " : Aborted";
 395       data->access_units[index].status = status;
 396       data->access_units.resize(index + 1);
 397       break;
 398
 399     case DemuxerStream::kConfigChanged:
 400       CHECK((is_audio && audio_stream_) || (!is_audio && video_stream_));
 401       data->demuxer_configs.resize(1);
 402       CHECK(GetDemuxerConfigFromStream(&data->demuxer_configs[0], is_audio));
 403       if (!is_audio) {
 404         gfx::Size size = data->demuxer_configs[0].video_size;
 405         DVLOG(1) << "Video config is changed: " << size.width() << "x"
 406                  << size.height();
 407       }
 408       data->access_units[index].status = status;
 409       data->access_units.resize(index + 1);
 410       break;
 411
 412     case DemuxerStream::kOk:
 413       data->access_units[index].status = status;
 414       if (buffer->end_of_stream()) {
 415         data->access_units[index].end_of_stream = true;
 416         data->access_units.resize(index + 1);
 417         break;
 418       }
 419       // TODO(ycheo): We assume that the inputed stream will be decoded
 420       // right away.
 421       // Need to implement this properly using MediaPlayer.OnInfoListener.
 422       if (is_audio) {
 423         statistics_.audio_bytes_decoded += buffer->data_size();
 424       } else {
 425         statistics_.video_bytes_decoded += buffer->data_size();
 426         statistics_.video_frames_decoded++;
 427       }
 428       data->access_units[index].timestamp = buffer->timestamp();
 429
 430       data->access_units[index].data.assign(
 431           buffer->data(), buffer->data() + buffer->data_size());
 432       // Vorbis needs 4 extra bytes padding on Android. Check
 433       // NuMediaExtractor.cpp in Android source code.
 434       if (is_audio && media::kCodecVorbis ==
 435           audio_stream_->audio_decoder_config().codec()) {
 436         data->access_units[index].data.insert(
 437             data->access_units[index].data.end(), kVorbisPadding,
 438             kVorbisPadding + 4);
 439       }
 440       if (buffer->decrypt_config()) {
 441         data->access_units[index].key_id = std::vector<char>(
 442             buffer->decrypt_config()->key_id().begin(),
 443             buffer->decrypt_config()->key_id().end());
 444         data->access_units[index].iv = std::vector<char>(
 445             buffer->decrypt_config()->iv().begin(),
 446             buffer->decrypt_config()->iv().end());
 447         data->access_units[index].subsamples =
 448             buffer->decrypt_config()->subsamples();
 449       }
 450       if (++index < data->access_units.size()) {
 451         ReadFromDemuxerStream(type, data.Pass(), index);
 452         return;
 453       }
 454       break;
 455
 456     default:
 457       NOTREACHED();
 458   }
 459
 460   if (!IsSeeking() && demuxer_client_)
 461     demuxer_client_->ReadFromDemuxerAck(demuxer_client_id_, *data);
 462 }
 463
 464 void MediaSourceDelegate::OnDemuxerError(media::PipelineStatus status) {
 465   DVLOG(1) << __FUNCTION__ << "(" << status << ") : " << demuxer_client_id_;
 466   // |update_network_state_cb_| is bound to the main thread.
 467   if (status != media::PIPELINE_OK && !update_network_state_cb_.is_null())
 468     update_network_state_cb_.Run(PipelineErrorToNetworkState(status));
 469 }
 470
 471 void MediaSourceDelegate::AddTextStream(
 472     media::DemuxerStream* /* text_stream */ ,
 473     const media::TextTrackConfig& /* config */ ) {
 474   // TODO(matthewjheaney): add text stream (http://crbug/322115).
 475   NOTIMPLEMENTED();
 476 }
 477
 478 void MediaSourceDelegate::RemoveTextStream(
 479     media::DemuxerStream* /* text_stream */ ) {
 480   // TODO(matthewjheaney): remove text stream (http://crbug/322115).
 481   NOTIMPLEMENTED();
 482 }
 483
 484 void MediaSourceDelegate::OnDemuxerInitDone(media::PipelineStatus status) {
 485   DCHECK(media_task_runner_->BelongsToCurrentThread());
 486   DVLOG(1) << __FUNCTION__ << "(" << status << ") : " << demuxer_client_id_;
 487   DCHECK(chunk_demuxer_);
 488
 489   if (status != media::PIPELINE_OK) {
 490     OnDemuxerError(status);
 491     return;
 492   }
 493
 494   audio_stream_ = chunk_demuxer_->GetStream(DemuxerStream::AUDIO);
 495   video_stream_ = chunk_demuxer_->GetStream(DemuxerStream::VIDEO);
 496
 497   if (audio_stream_ && audio_stream_->audio_decoder_config().is_encrypted() &&
 498       !set_decryptor_ready_cb_.is_null()) {
 499     InitAudioDecryptingDemuxerStream();
 500     // InitVideoDecryptingDemuxerStream() will be called in
 501     // OnAudioDecryptingDemuxerStreamInitDone().
 502     return;
 503   }
 504
 505   if (video_stream_ && video_stream_->video_decoder_config().is_encrypted() &&
 506       !set_decryptor_ready_cb_.is_null()) {
 507     InitVideoDecryptingDemuxerStream();
 508     return;
 509   }
 510
 511   // Notify demuxer ready when both streams are not encrypted.
 512   is_demuxer_ready_ = true;
 513   NotifyDemuxerReady();
 514 }
 515
 516 void MediaSourceDelegate::InitAudioDecryptingDemuxerStream() {
 517   DCHECK(media_task_runner_->BelongsToCurrentThread());
 518   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
 519   DCHECK(!set_decryptor_ready_cb_.is_null());
 520
 521   audio_decrypting_demuxer_stream_.reset(new media::DecryptingDemuxerStream(
 522       media_task_runner_, set_decryptor_ready_cb_));
 523   audio_decrypting_demuxer_stream_->Initialize(
 524       audio_stream_,
 525       base::Bind(&MediaSourceDelegate::OnAudioDecryptingDemuxerStreamInitDone,
 526                  media_weak_factory_.GetWeakPtr()));
 527 }
 528
 529 void MediaSourceDelegate::InitVideoDecryptingDemuxerStream() {
 530   DCHECK(media_task_runner_->BelongsToCurrentThread());
 531   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
 532   DCHECK(!set_decryptor_ready_cb_.is_null());
 533
 534   video_decrypting_demuxer_stream_.reset(new media::DecryptingDemuxerStream(
 535       media_task_runner_, set_decryptor_ready_cb_));
 536   video_decrypting_demuxer_stream_->Initialize(
 537       video_stream_,
 538       base::Bind(&MediaSourceDelegate::OnVideoDecryptingDemuxerStreamInitDone,
 539                  media_weak_factory_.GetWeakPtr()));
 540 }
 541
 542 void MediaSourceDelegate::OnAudioDecryptingDemuxerStreamInitDone(
 543     media::PipelineStatus status) {
 544   DCHECK(media_task_runner_->BelongsToCurrentThread());
 545   DVLOG(1) << __FUNCTION__ << "(" << status << ") : " << demuxer_client_id_;
 546   DCHECK(chunk_demuxer_);
 547
 548   if (status != media::PIPELINE_OK)
 549     audio_decrypting_demuxer_stream_.reset();
 550   else
 551     audio_stream_ = audio_decrypting_demuxer_stream_.get();
 552
 553   if (video_stream_ && video_stream_->video_decoder_config().is_encrypted()) {
 554     InitVideoDecryptingDemuxerStream();
 555     return;
 556   }
 557
 558   // Try to notify demuxer ready when audio DDS initialization finished and
 559   // video is not encrypted.
 560   is_demuxer_ready_ = true;
 561   NotifyDemuxerReady();
 562 }
 563
 564 void MediaSourceDelegate::OnVideoDecryptingDemuxerStreamInitDone(
 565     media::PipelineStatus status) {
 566   DCHECK(media_task_runner_->BelongsToCurrentThread());
 567   DVLOG(1) << __FUNCTION__ << "(" << status << ") : " << demuxer_client_id_;
 568   DCHECK(chunk_demuxer_);
 569
 570   if (status != media::PIPELINE_OK)
 571     video_decrypting_demuxer_stream_.reset();
 572   else
 573     video_stream_ = video_decrypting_demuxer_stream_.get();
 574
 575   // Try to notify demuxer ready when video DDS initialization finished.
 576   is_demuxer_ready_ = true;
 577   NotifyDemuxerReady();
 578 }
 579
 580 void MediaSourceDelegate::OnDemuxerSeekDone(media::PipelineStatus status) {
 581   DCHECK(media_task_runner_->BelongsToCurrentThread());
 582   DVLOG(1) << __FUNCTION__ << "(" << status << ") : " << demuxer_client_id_;
 583   DCHECK(IsSeeking());
 584
 585   if (status != media::PIPELINE_OK) {
 586     OnDemuxerError(status);
 587     return;
 588   }
 589
 590   ResetAudioDecryptingDemuxerStream();
 591 }
 592
 593 void MediaSourceDelegate::ResetAudioDecryptingDemuxerStream() {
 594   DCHECK(media_task_runner_->BelongsToCurrentThread());
 595   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
 596   if (audio_decrypting_demuxer_stream_) {
 597     audio_decrypting_demuxer_stream_->Reset(
 598         base::Bind(&MediaSourceDelegate::ResetVideoDecryptingDemuxerStream,
 599                    media_weak_factory_.GetWeakPtr()));
 600     return;
 601   }
 602
 603   ResetVideoDecryptingDemuxerStream();
 604 }
 605
 606 void MediaSourceDelegate::ResetVideoDecryptingDemuxerStream() {
 607   DCHECK(media_task_runner_->BelongsToCurrentThread());
 608   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
 609   if (video_decrypting_demuxer_stream_) {
 610     video_decrypting_demuxer_stream_->Reset(base::Bind(
 611         &MediaSourceDelegate::FinishResettingDecryptingDemuxerStreams,
 612         media_weak_factory_.GetWeakPtr()));
 613     return;
 614   }
 615
 616   FinishResettingDecryptingDemuxerStreams();
 617 }
 618
 619 void MediaSourceDelegate::FinishResettingDecryptingDemuxerStreams() {
 620   DCHECK(media_task_runner_->BelongsToCurrentThread());
 621   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
 622
 623   base::AutoLock auto_lock(seeking_lock_);
 624   DCHECK(seeking_);
 625   seeking_ = false;
 626   doing_browser_seek_ = false;
 627   demuxer_client_->DemuxerSeekDone(demuxer_client_id_, browser_seek_time_);
 628 }
 629
 630 void MediaSourceDelegate::NotifyDemuxerReady() {
 631   DCHECK(media_task_runner_->BelongsToCurrentThread());
 632   DVLOG(1) << __FUNCTION__ << " : " << demuxer_client_id_;
 633   DCHECK(is_demuxer_ready_);
 634
 635   scoped_ptr<DemuxerConfigs> configs(new DemuxerConfigs());
 636   GetDemuxerConfigFromStream(configs.get(), true);
 637   GetDemuxerConfigFromStream(configs.get(), false);
 638   configs->duration = GetDuration();
 639
 640   if (demuxer_client_)
 641     demuxer_client_->DemuxerReady(demuxer_client_id_, *configs);
 642
 643   base::AutoLock auto_lock(is_video_encrypted_lock_);
 644   is_video_encrypted_ = configs->is_video_encrypted;
 645 }
 646
 647 base::TimeDelta MediaSourceDelegate::GetDuration() const {
 648   DCHECK(media_task_runner_->BelongsToCurrentThread());
 649   if (!chunk_demuxer_)
 650     return media::kNoTimestamp();
 651
 652   double duration = chunk_demuxer_->GetDuration();
 653   if (duration == std::numeric_limits<double>::infinity())
 654     return media::kInfiniteDuration();
 655
 656   return media::ConvertSecondsToTimestamp(duration);
 657 }
 658
 659 void MediaSourceDelegate::OnDemuxerOpened() {
 660   DCHECK(main_task_runner_->BelongsToCurrentThread());
 661   if (media_source_opened_cb_.is_null())
 662     return;
 663
 664   media_source_opened_cb_.Run(new media::WebMediaSourceImpl(
 665       chunk_demuxer_.get(), base::Bind(&LogMediaSourceError, media_log_)));
 666 }
 667
 668 void MediaSourceDelegate::OnNeedKey(const std::string& type,
 669                                     const std::vector<uint8>& init_data) {
 670   DCHECK(main_task_runner_->BelongsToCurrentThread());
 671   if (need_key_cb_.is_null())
 672     return;
 673
 674   need_key_cb_.Run(type, init_data);
 675 }
 676
 677 bool MediaSourceDelegate::IsSeeking() const {
 678   base::AutoLock auto_lock(seeking_lock_);
 679   return seeking_;
 680 }
 681
 682 base::TimeDelta MediaSourceDelegate::FindBufferedBrowserSeekTime_Locked(
 683     const base::TimeDelta& seek_time) const {
 684   seeking_lock_.AssertAcquired();
 685   DCHECK(seeking_);
 686   DCHECK(doing_browser_seek_);
 687   DCHECK(chunk_demuxer_) << "Browser seek requested, but no chunk demuxer";
 688
 689   media::Ranges<base::TimeDelta> buffered =
 690       chunk_demuxer_->GetBufferedRanges();
 691
 692   for (size_t i = 0; i < buffered.size(); ++i) {
 693     base::TimeDelta range_start = buffered.start(i);
 694     base::TimeDelta range_end = buffered.end(i);
 695     if (range_start <= seek_time) {
 696       if (range_end >= seek_time)
 697         return seek_time;
 698       continue;
 699     }
 700
 701     // If the start of the next buffered range after |seek_time| is too far
 702     // into the future, do not jump forward.
 703     if ((range_start - seek_time) > base::TimeDelta::FromMilliseconds(100))
 704       break;
 705
 706     // TODO(wolenetz): Remove possibility that this browser seek jumps
 707     // into future when the requested range is unbuffered but there is some
 708     // other buffered range after it. See http://crbug.com/304234.
 709     return range_start;
 710   }
 711
 712   // We found no range containing |seek_time| or beginning shortly after
 713   // |seek_time|. While possible that such data at and beyond the player's
 714   // current time have been garbage collected or removed by the web app, this is
 715   // unlikely. This may cause unexpected playback stall due to seek pending an
 716   // append for a GOP prior to the last GOP demuxed.
 717   // TODO(wolenetz): Remove the possibility for this seek to cause unexpected
 718   // player stall by replaying cached data since last keyframe in browser player
 719   // rather than issuing browser seek. See http://crbug.com/304234.
 720   return seek_time;
 721 }
 722
 723 bool MediaSourceDelegate::GetDemuxerConfigFromStream(
 724     media::DemuxerConfigs* configs, bool is_audio) {
 725   DCHECK(media_task_runner_->BelongsToCurrentThread());
 726   if (!is_demuxer_ready_)
 727     return false;
 728   if (is_audio && audio_stream_) {
 729     media::AudioDecoderConfig config = audio_stream_->audio_decoder_config();
 730     configs->audio_codec = config.codec();
 731     configs->audio_channels =
 732         media::ChannelLayoutToChannelCount(config.channel_layout());
 733     configs->audio_sampling_rate = config.samples_per_second();
 734     configs->is_audio_encrypted = config.is_encrypted();
 735     configs->audio_extra_data = std::vector<uint8>(
 736         config.extra_data(), config.extra_data() + config.extra_data_size());
 737     return true;
 738   }
 739   if (!is_audio && video_stream_) {
 740     media::VideoDecoderConfig config = video_stream_->video_decoder_config();
 741     configs->video_codec = config.codec();
 742     configs->video_size = config.natural_size();
 743     configs->is_video_encrypted = config.is_encrypted();
 744     configs->video_extra_data = std::vector<uint8>(
 745         config.extra_data(), config.extra_data() + config.extra_data_size());
 746     return true;
 747   }
 748   return false;
 749 }
 750
 751 }  // namespace content